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SFTP: Get access to underlying objects from TElSimpleSFTPServer
Sometimes you need to read or adjust properties of the low-level classes, incapsulated in TElSimpleSFTPServer.
TElSimpleSFTPServer fires OnOpenSubsystem event, the first parameter of which, Sender, is an instance of TElSimpleSFTPServerSessionThread class. TElSimpleSFTPServerSessionThread has read-only properties such as SFTPServer (owning TElSimpleSFTPServer), Socket (TElSocket) and SSHServer (TElSSHServer) which you can use for your purposes.